Datasheet > PC87109

PC87109

更新时间： 2024-11-07 23:26:43

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PC87109 数据手册

Preliminary

November 1997

PC87109VBE Advanced UART and Infrared Controller

General Description

Features

The PC87109 is a serial communication device with

infrared capability. It supports 6 modes of operation and is

backward compatible with the 16550 and 16450 (except for

the MODEM control functions). The operational modes are:

■

Compatible with 16550 and 16450 devices

Extended UART mode

Sharp-IR with selectable internal or external

modulation

UART, Sharp-IR, IrDA 1.0 SIR, IrDA 1.1 MIR and FIR, and

Consumer Electronics IR (also referred to as TV Remote or

Consumer Remote Control).

■

IrDA 1.0 SIR with up to 115.2 Kbaud data rate

IrDA 1.1 MIR and FIR with 0.576, 1.152 and 4.0 Mbps

data rates

In order to support existing legacy software based upon the

16550 UART, the PC87109 provides a special fallback

mechanism that automatically switches the device to 16550

compatibility mode when the baud generator divisor is

accessed through the legacy ports in bank 1.

■

Consumer Electronics IR mode

UART mode data rates up to 1.5 Mbps

Back-to-Back infrared frame transmission and

reception

■

Full duplex infrared frame transmission and reception

Transmit deferral

The device architecture has been optimized to meet the

requirements of a variety of UART and infrared based

applications. DMA support for all operational modes has

been incorporated into the architecture.

Automatic fallback to 16550 compatibility mode

Selectable 16 or 32 level FIFOs

12-bit timer for infrared protocol support

Programmable IRQ and DMA signals polarity

Support for power management

5V or 3.3V operation with back drive protection

32-pin TQFP package

The device uses one DMA channel. One channel is

required for infrared based applications since infrared

communications work in half duplex fashion.

To further ease driver design and simplify the

implementation of infrared protocols, a 12-bit timer with 125µs

resolution has also been included.

Block Diagram

SOUT

UART Module

SIN

Interrupt

IRQ

Request

Control

Sharp-IR Module

DASK

DRQ

DMA Request

Control

IrDA 1.0 Module

115.2 Kbps

SIR

DACK

IrDA 1.1 Module

0.576 & 1.152 Mbps

Configuration

Registers

To IR Transceivers

A0-A3

MIR

IrDA 1.1 Module

4.0 Mbps

FIR

D0-D7

8 Bit Data Bus

Consumer Electronics IR Module

CEIR

TRI-STATE is a registered trademark of National Semiconductor Corp.

WATCHDOG™ is a trademark of National Semiconductor Corp.

www.national.com

12 3 4 5 6 7...56

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与PC87109相关器件

型号	品牌	获取价格	描述	数据表
PC87109EB	TI	获取价格	1 CHANNEL(S), 4Mbps, SERIAL COMM CONTROLLER, PQFP32, TQFP-32
PC87109VBE	NSC	获取价格	PC87109VBE Advanced UART and Infrared Controller
PC87120	NSC	获取价格	PC87120 SuperAT⑩
PC87200	NSC	获取价格	PC87200 PCI to ISA Bridge
PC87200160A	NSC	获取价格	PC87200 PCI to ISA Bridge
PC87200-160A	ETC	获取价格	PCI Bus Interface/Controller
PC87200VUL	TI	获取价格	ISA BUS CONTROLLER, PQFP160, PLASTIC, QFP-160
PC87200VUL	WINBOND	获取价格	ISA Bus Controller, CMOS, PQFP160, PLASTIC, QFP-160
PC87200VUL/NOPB	WINBOND	获取价格	ISA Bus Controller, CMOS, PQFP160, PLASTIC, QFP-160
PC87200VUL160A	NSC	获取价格	PC87200 PCI to ISA Bridge

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